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Frequently Asked Questions

How to read the FIFO data ?

Holtek Semiconductor - Keyboard/Joystick MCU Series FAQs
HT82K96A/HT82K96E FIFO is read by Packet. To read from the FIFO, the following process should be followed: Repeat the step 2 and 3 untill the ready bit becomes 0 which indicates the end of the FIFO data reading. User reads the data through the FIFO pointer register, user has to record the number of bytes to be read. HT82K96A/HT82K96E allows a maximum of 8 bytes of data in each packet.

How do I write FIFO data?

Holtek Semiconductor - Keyboard/Joystick MCU Series FAQs
HT82K96A/HT82K96E FIFO is written by Packet. To write to the FIFO, the following process should be followed: Repeat the step 2 and 3 till the writing is complete or the ready bit becomes 0 which indicates the FIFO no longer allows any data writing. User writes the data through the FIFO pointer register, user has to record the number of bytes that have written. HT82K96A/HT82K96E allows a maximum of 8 bytes of data in each packet. See similar questions...

How do I know the FIFO data is zero length handshake?

Holtek Semiconductor - Keyboard/Joystick MCU Series FAQs
If the PC sends the zero length handshake data to HT82K96A/HT82K96E, the LEN0 bit of the MISC register will be set to 1 for indication. However the status bit will not be cleared automatically, this bit has to be cleared by user. See similar questions...

How do I read data from the Galvactiavator?

Data from the Galvactivator can be obtained by recording data from the jack next to the potentiometer. These signals should be fed into an analog to digital converter. For intance, a PIC16C711 mounted on an iRX board can be wired with one signal as Vref and the second as AN0. Firmware that reads from the ADC should then be burned onto the PIC. Increased signal accuracy can be achieved by using op amp followers to buffer the signals from the Galvactivator. Boucsein, W. (1992). See similar questions...

How can I read/write structs from/to data files?

Infrequently Asked Questions in comp.lang.c
Loop with putchar. Be careful; if your machine uses signed chars by default, all of the sign bits in your structure elements will be reversed. [a] See similar questions...

Question: What is a FIFO?

NetShop UK - Cable management & USB/ADSL/Wireless Network pr...
Answer: A FIFO (First In First Out) is a type of buffer, where the first byte to arrive is the first to leave. Brainboxes Serial Devices all have Hardware FIFOs. FIFOs reduce the chances of data loss by 'buffering' the data. This way the device driver can then read all of the data from the FIFO in one go, whilst communication is still continuing. If you imagine someone asking you to load apples on to a lorry. See similar questions...

What is a FIFO buffer?

NCIA Support
A FIFO (First in-First out) buffer is what a UART chip uses to process data more smoothly. The data is fed to the buffer in a stream, stops, and then sends the data out. This process allows for Windows to continue with other things while the buffer does the work on a hardware level. The buffer will then send a request to the Windows kernel to continue the data stream after it has dumped the characters out. See similar questions...

How fast can you read/write data on a Blu-ray disc?

Blu-ray.com - Blu-ray FAQ
According to the Blu-ray Disc specification, 1x speed is defined as 36Mbps. However, as BD-ROM movies will require a 54Mbps data transfer rate the minimum speed we're expecting to see is 2x (72Mbps). Blu-ray also has the potential for much higher speeds, as a result of the larger numerical aperture (NA) adopted by Blu-ray Disc. See similar questions...

How can I read image data from a camera?

Player Project
For Player users, see the FAQ entry on reading camera data; from Player's perspective, Gazebo cameras work just like real cameras (which means you can develop image processing algorithms using Gazebo-simulated images). librtk NOTE: librtk has been deprecated. As of Stage 1.6 and Player 1.6.3, librtk is no longer used by any P/S/G package. You do NOT need to download and install it. See similar questions...

How do I read (or write) binary data?

Python Library and Extension FAQ
or complex data formats, it's best to use the struct module. It allows you to take a string containing binary data (usually numbers) and convert it to Python objects; and vice versa. For example, the following code reads two 2-byte integers and one 4-byte integer in big-endian format from a file: import struct f = open(filename, "rb") # Open in binary mode for portability s = f.read(8) x, y, z = struct. See similar questions...

Can DataVision read data from anywhere else?

DataVision FAQ
Yes. DataVision can read from character-separated text files. There is no GUI support yet for telling DataVision about the structure of the contents of the text file; see charsep in the User's Manual for details on how to edit your report XML file to describe the contents of the file. Similar to the way that there are multiple layout engines, there are multiple data sources. Only two are implemented: JDBC databases and character-separated text files. See similar questions...

I have the data for my game in a file. How can I read it?

IENJINIA Devkit FAQ
Place your data file in your project directory, then use the readFile("filename") method to read it. This method returns the content of the file as an array of numbers (one for each byte in the file). See similar questions...

Can I read table data with OCR?

Kofax: Support: Ascent Capture v7 FAQs
No. There is no support for the direct recognition of (such as by OCR) of table data. If this is needed, then you can either chose to implement customizations, or purchase an add-on product that supports such a feature. See similar questions...

How can I read colour data from a texture?

Direct3D FAQ
You may want to read colour data from a texture if for example you use a texture to encode level data. e.g. a blue colour means put a wall here, a red means an enemy etc. Firstly you need to create your image in either bmp or tga format. You then need to load it into your program. You must force it to be 32 bit even if it was not originally. It is important to do this so you know the format of the data and hence how to read it. See similar questions...

How can one read a replicated data object?

FAQ - SRB
When a user reads a replicated data object, SRB cycles through all the copies of the data object and reads the one that is accessible at that time. It uses a simple mechanism to order this list of replicated data objects. Copies stored in the resources belonging to the "cache" class (cache, temporary) will be put at the top of the list and copies stored in the "archival" class (archival, permanant) are put at the bottom of the list. See similar questions...

How do I set the FIFO as input or output?

Holtek Semiconductor - Keyboard/Joystick MCU Series FAQs
By the Tx bit of MISC bit; Tx bit=1 for output, and Tx bit=0 for Input. For detailed spec. please check Holtek data sheet. See similar questions...

Is the FIFO depth adjustable?

Pericom - Frequently Asked Questions (FAQs) - By Product Fam...
from http://www.intel.com/design/bridge/index.htm ) The Intel 21154 has (in bytes) . Primary write = 88 bytes , read = 72 bytes, Delayed entries =3 secondary write= 152 bytes . read =152 bytes,Delayed entries= 3 . For the Pericom PI7C8154: (posted write buffer and delayed transaction buffer data size for FIFOs)primary write= 128+128 bytes. Read= 128+128 bytes. Delayed entries= 8. The same for the secondary.Thus the Pericom 8154 has MORE FIFO buffering than Intel. See similar questions...

How can I read my VAX binary data somewhere else?

Fortran FAQ
Some vendors provide bulit in methods (DEC provides this via special options on the OPEN statement). Others provide library support (on SPARC products, with the SunPro compilers, checkout convert_external) Robert Hickler Tel (303) 863-8088 Accelr8 Technology Email robert@accelr8.com for more information. The following three Q's and A's based on email from: It is very common; and of course is part of Fortran 90. See similar questions...

How do I read and print data in FORTRAN?

Department of Statistics: Computing Guide - Frequently Asked...
explanation of the above invocation might help. It says that the compiler should look in /usr/local/include for include files and in /usr/local/lib for libraries in addition to the standard places. The -Wl,-rpath,/usr/local/lib switch tells that when the program is actually invoked, it should find dynamic libraries in the directory /usr/local/lib. This is necessary since we use shared libraries on our machine whenever possible. See similar questions...

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